Glossary

Combined cycle generation
A combined cycle power plant is the most efficient way to generate electricity. The combined cycle unit reuses the waste heat in a heat recovery steam generator (see sequential combustion and heat recovery steam generator).

CCGT
Combined Cycle Gas Turbine

Carbon intensity per MWh
Emissions of CO 2 (kg)
MWh sent out

CO2
Carbon Dioxide

CSM
Coal Seam Methane

EPC
Engineering Procurement and Construction

GJ
Gigajoule

HRSG
Heat Recovery Steam Generator (also called Waste Heat Boiler) is part of the combined cycle operation at the Mica Creek and Swanbank E power stations.

Joule
Joule (J) is a unit of energy - defined as the energy expended in one second by an electric current of one Amp flowing through a resistance of one Ohm.
A kilojoule (KJ) is 1,000 joules.
A megajoule (MJ) is one million joules.
A gigajoule (GJ) is one billion joules.

ISO
International Standards Organisation (also known as the International Organisation for Standardisation)

GHG
Greenhouse Gases

GI
Greenhouse Intensity - emissions of greenhouse gases sent out per megawatt hour.

GWh
Gigawatt hour = 1 billion watt hours

kV
kiloVolt - one thousand volts

Kw
KiloWatt (see watt)

kWh
kiloWatt hour = 1,000 Watt hours

Lost time injury (LTI)
An industry standard used by CS Energy to record and monitor safety performance in the workplace (AS 1885.1-1990: workplace injury and disease recording standard.)

Lost time injury frequency rate (LTIFR)
Lost time injury
Employee hours (million)
(12 month moving average)

MJ
MegaJoule (see joules)

MWh
megawatt hour = I million watt hours

NEM
National Electricity Market

NOx
Oxides of Nitrogen (Includes both NO and NO 2 )

PJ
PetaJoule = 1,000,000,000,000,000 Joules

Sequential combustion
Sequential combustion is based on the simple concept of reusing heat, where the exhaust gases from the first turbine feed the combustor of the second. At the Swanbank E power station, this process raises the net efficiency of the gas turbine to 58% in combined cycle operation, compared to 44% efficiency achieved from the best coal fired technology.
The Swanbank E turbine generates 260 megawatts by itself, but 385 megawatts in the combined cycle with the heat recovery steam generator and the steam turbine.

SOx
Oxides of Sulphur (Includes SO 2 and S0 3)

TJ
TeraJoule = 1,000,000,000,000 Joules

UCG
Underground Coal Gasification

Watt
A watt (W) is a measure of electricity. 1 watt = 1 volt x 1 amp = 1 joule/second
A kilowatt (KW) is one thousand watts
A megawatt (MW) is one million watts
A gigawatt (GW) is one billion watts

Reliability
A measure of a generator's capability to achieve full load if the plant is not on a planned outage (ie for scheduled maintenance).

Reportable environmental incidents
Refers to incidents that result in a release to the environment which are notified to the Environmental Protection Agency (EPA) as a condition of license.